Showing results for 
Search instead for 
Did you mean: 
What's DOS?
Posts: 1
Registered: ‎02-11-2013
Location: Illinois USA
Views: 340
Message 1 of 2

T410 AC Power On Feature

I am looking for some assistance in getting this feature up and running.  I have flashed 5 T410s to the newest 1.49 BIOS so they have the AC POWER ON feature in the BIOS and enabled the setting.  However they are not powering on when the AC is turned on.  It sporadically works when I monkey with the devices, but it is not consistent or showing a pattern for me to figure it out.  We are trying to mount them in Enovate mobile carts and wish to remove the battery as the carts have batteries in them to make them mobile and we do not want to waste the laptop battery.  The cart has a separate power button for the cart and one that connects to the dock port on the bottom that can turn the unit on and off.  We really want to have one power button that turn everything off and on to not confuse the end users however in order to do so we need the AC enabled to be working.    Anyone else have any similar issues with the AC Enabled setting for the T410s?

Retired Support Specialist
Posts: 1,291
Registered: ‎12-06-2012
Location: Raleigh, NC
Views: 313
Message 2 of 2

Re: T410 AC Power On Feature

Hi, AdvocateAndrew


I just did some tests on an L412 to better understand this issue and I discovered something: The machine would boot on as intended every time it received power, but would lose this functionality once the battery was removed, after which the BIOS setting had to be redone before it would work again. So, at least during my tests, the battery had to be in the system and could not be removed. Perhaps this applies to your system as well. I fully understand wanting to preserve the battery, but it may not be possible. I think that having the battery in the computer gives the system enough power to recognize that the AC adapter has been plugged in. 


Hope it helps,


Did someone help you today? Press the star on the left to thank them with a Kudo!

If you find a post helpful and it answers your question, please mark it as an "Accepted Solution!" This will help the rest of the community with similar issues identify the verified solution and benefit from it.

Check out current deals!

Shop current deals

Top Kudoed Authors